bader22 - Free Online Quiz Maker

Q1 Score: 2.04

a- ContainscovalentlylinkedRNA&DNA.

b- ContainsacoreoftwoeachofhistonesH2A,H2B,H3&H4.

c- Requireaspecificbasesequenceforformation

d- ContainacoreoftwoeachofhistonesH1,H2,&H5.

Q2 Score: 2.04

a- 2'-hydroxylofonenucleotideto3'-hydroxylofthe ABCDE 1 2 3 4 5 6 Yourscore:.../6 6- following

b- 3'-hydroxylofonenucleotideto3'-hydroxylofthefollowing.

3'-hydroxyl of one nucleotide to 5'-hydroxyl of the following.

d- 5'-hydroxylofonenucleotideto5'-hydroxylofthe following.

Q4 Score: 2.04

a- Buildingunitsofnucleicacids

b- Sources of highenergy

c- Second messengers

d- Structuralcomponentsofmembranes

Q7 Score: 2.04

a- Cleavage of the phosphodiester bonds.

b- The formation of triple helix.

c- A decrease in light absorption at 260 nm.

d- Thedenaturatedtemperatureisdirectlyrelatedwiththeguanine & cytosine contents.

Q8 Score: 2.04

a- A nucleoside

b- A nucleotide

c- A purine ring.

d- A pyrimidine ring

Q9 Score: 2.04

a- Deoxyuridylate

b- Deoxyguanylate

c- Deoxyadenylate

d- Deoxycytidylate

Q11 Score: 2.04

a- Appearanceofthemajor&minorgrooves.

b- Thickness of the helix

c- Polarity of the strands.

d- Numberofbasepairs/turn.

Q12 Score: 2.04

a- dehydrated,carbon3.

b- Oxygenated,carbon2.

c- Oxygenated,carbon3.

d- Deoxygenate,carbon2

Q13 Score: 2.04

a- N-glycosidic linkage

b- Peptide bond

c- Phospho diester bond

d- Hydrogen bond.

Q14 Score: 2.04

a- Hydrophobic interactions

b- Phosphodiester bond.

c- Vanderwaalsforce

d- Hydrogen bond.

Q15 Score: 2.04

a- Pyrimidine + pentose + phosphate.

b- Purine + pentose + phosphate.

c- Purine or pyrimidine + pentose.

d- Purine or pyrimidine + phosphate

Q16 Score: 2.04

a- A=3100 , T=2600 , C=2600 , G=3100.

b- A=3000 , T=2200 , C=3400 , G=3200.

c- A=2600 , T=2600 , C=3300 , G=3300.

d- A=3300 , T=3300 , C=2600 , G=2600.

Q17 Score: 2.04

a- Poly-nucleoside

b- Poly-nucleotide

c- Either (a) or (b).

d- Neither (a) nor. (b)

Q18 Score: 2.04

a- DNA ispolydeoxynucleotide

DNAexistsasadoublehelixoftwocomplementaryanti- parallel strands

c- Thymidylate is a distinctive component of D

DNAhas3'-endsononeside,&two5'-endsontheotherside.

Q19 Score: 2.04

a- Adenine & cytosine.

b- Guanine & thymine.

c- Adenine & guanine.

d- Thymine & uracil.

Q20 Score: 2.04

a- ThehelicalstructureofDNAhasamajor(wide)groove&a minor (narrow)groove.

b- Regulatoryproteinsbindtothemajor&minorgrooves, regulating DNA & RNA synthesis.

c- Separation of the two DNA strands from each other occurs at high temperature & is called reannealing.

d- Themeltingtemperature(Tm)isthetemperatureatwhichhalf of the helical structure of DNA is lost.

Q22 Score: 2.04

a- Thetwoendsarestructureequivalent

b- Themonomericunitsjoinedtogetherbyphosphodiester bonds

c- There are at least 20 different monomers that can be used.

d- Themonomericunitsarenotseparatedbyhydrolysis

Q23 Score: 2.04

1- The two nucleotide strands are held together by hydrogen

The number of thymidylate subunits should equal the number of deoxycytidylatesubunits

The number of deoxyadenylate subunits is essentially equal to the number of deoxyguanylate subunits

All the above is true.

Q24 Score: 2.04

a- DNAisformedoftwobranchedpolydeoxyribonucleotide chains

b- DNAissynthesizedbypolymerizationofdeoxynucleotides

c- DNAispresentinthenucleusandthemitochondria

d- BacterialDNAispresentinthesinglechromosome&the plasmids.

Q25 Score: 2.04

a- A nucleoside phosphate

b- Ribose diphosphate

c- A nucleoside minus phosphate

d- A hydrolytic product of nucleosides

Q27 Score: 2.04

a- Hydrogenbond

b- Phosphodiester bonds.

c- Glycosidicbonds

d- all theabove

Q28 Score: 2.04

a- Deoxynucleic acid.

b- Deoxyribonucleic acid.

c- Deoxyribodeoxynucleic acid

d- Dioxyribonucleic acid

Q29 Score: 2.04

a- Theindividualstrandsarenothelical

b- Hydrogenbondsformbetweenpurine&pyrimidinebaseon the samestrand.

c- Adenine on one strand is hydrogen bonded to thymine on the opposite strand

d- Phosphodiesterbondsareorientedtowardtheinteriorofthe helix

Q31 Score: 2.04

a- Deoxyguanylate&deoxycytidylateareattachedtoeachother by two hydrogen bonds.

Threehydrogenbondsexistbetweendeoxyadenylate

c- The A-T attraction is about 50% stronger than the C-G attraction

d- Noneoftheaboveistrue

Q32 Score: 2.04

a- Phosphoric acid.

b- Pentoses

c- Adenosine

d- Cytosine

Q36 Score: 2.04

a- Ribose

b- 2'-deoxyribose

c- 5'-deoxyribose

d- Any of the above.

Q37 Score: 2.04

a- Hasfewerbasepairs/turnthanBDNA helix.

b- Is permanent conformation of DNA.

c- HasahighcontentofCGsequence

d- Right handed double helix.

Q38 Score: 2.04

a- Atriple-strandstructure

b- TheDNAstrandsrunninginoppositedirections

c- BasepairingbetweenbasesA&G.

d- Covalent bonding between bases.

Q40 Score: 2.04

a- DNAisdoublestrandedwhileRNAisabsolutelysingle stranded

b- DNAisresponsibleforstoringgeneticinformation&their transfer to daughter cells.

c- RNA is responsible for expressing the genetic information in the form of protein molecules.

d- DNAislocatedinthecellnuclei,whileRNAislocatedonlyin the cytoplasm

Q41 Score: 2.04

a- Adenine + guanine.

b- Cytosine+thymine.

c- Adenine +thymine.

d- Cytosine+guanine

Q42 Score: 2.04

a- A nitrogen base & ribose.

b- A nitrogen base , a pentose & phosphate.

c- A nitrogen base & phosphate

d- Any of the above

Q43 Score: 2.04

a- A&TrichDNAdenaturesatalowertemperaturethanG&C rich DNA

b- Denaturationcausesanincreaseinabsorbanceat260nmofa DNA solution

c- Both (a) & (b).

d- Neither(a)nor(b).

Q44 Score: 2.04

a- DNAisfoundassociatedwithproteins,formingnucleoprotein.

b- The5'-endofonestrandofDNAisbase-pairedwiththe3'-end of the other strand.

c- Phosphodiester bonds are heat resistant , but can be cleaved by nuclease enzymes.

d- DenaturationofDNAresultsfromdisruptionofphosphodiester bonds

Q45 Score: 2.04

a- Adenine equals thymine

b- Adenine equalsuracil

c- Guanine equals adenine.

d- Cytosineequalsthymine

Q46 Score: 2.04

a- 5'GTTCCCAA-3'.

b- 5'TTGGGAAC-3'.

c- 3'TTGGGAAC-5'.

d- 3'-GTTCCCAA-5'.

Q48 Score: 2.04

a- IsregulatoryrepeatingstructureofDNA&histonesproteins.

b- HasacoreofDNAwithproteinswrappedaroundtheoutside

c- Usesonlyonetypeofhistonespernucleosome

d- Is separated from a second nucleosome by non-histone protein.

Q49 Score: 2.04

a- histones Pts. (proteins)

b- non-histones Pts.

c- both a & b.

d- neither a nor b